Semiconductor device packages and methods of manufacturing the same

ABSTRACT

A semiconductor device package includes a connection structure having a first portion and a second portion extending from the first portion, the second portion having a width less than the first portion; and a dielectric layer surrounding the connection structure, wherein the dielectric layer and the second portion of the connection structure defines a space.

BACKGROUND 1. Field of the Disclosure

The present disclosure relates to, amongst other things, semiconductor device packages and methods of manufacturing the same.

2. Description of Related Art

A semiconductor device package may include some semiconductor devices stacked to one another. Hybrid bonding technique, which may refer to bonding that involves two or more materials (e.g. Cu-to-Cu bonding and dielectric-to-dielectric bonding), can be used to form the semiconductor device package. However, coefficient of thermal expansion (CTE) mismatch of two or more materials during or subsequent to thermal cycle(s) may result in delamination issue (e.g. delamination occurs on the interface of two dielectric layers), which adversely affect reliability or performance of the semiconductor device package.

SUMMARY

According to some example embodiments of the instant disclosure, a semiconductor device package includes a connection structure and a dielectric layer. The connection structure has a first portion and a second portion extending from the first portion. The second portion has a width less than the first portion. The dielectric layer surrounds the connection structure. The dielectric layer and the second portion of the connection structure define a space.

According to some example embodiments of the instant disclosure, a semiconductor device package includes a connection structure and a dielectric layer. The connection structure has a first portion and a second portion disposed on the first portion. The dielectric layer exposes part of an upper surface of the first portion of connection structure. The dielectric layer and the exposed part of the upper surface of the first portion of connection structure define a space.

According to some example embodiments of the instant disclosure, a method of manufacturing a semiconductor device package includes: forming a first portion of a connection structure on a substrate; forming a second portion of a connection structure on the first portion; and forming a dielectric layer to surround the connection structure and to define a space with the connection structure.

BRIEF DESCRIPTION OF THE DRAWINGS

Aspects of the present disclosure are readily understood from the following detailed description when read with the accompanying figures. It should be noted that various features may not be drawn to scale. In fact, the dimensions of the various features may be arbitrarily increased or reduced for clarity of discussion.

FIG. 1A is a cross-sectional view of a semiconductor device in accordance with some embodiments of the present disclosure.

FIG. 1B is an enlarged view of the connection structure as shown in FIG. 1A.

FIG. 1C is an enlarged view of the connection structure as shown in FIG. 1A.

FIG. 1D illustrates lattice direction of the connection structure as shown in FIG. 1C.

FIG. 1E is a cross-sectional view of a semiconductor device package in accordance with some embodiments of the present disclosure.

FIG. 2A, FIG. 2B, FIG. 2C, FIG. 2D, FIG. 2E, FIG. 2F, FIG. 2G, FIG. 2H, FIG. 2I, FIG. 2J, FIG. 2K, FIG. 2L, FIG. 2M, FIG. 2N, FIG. 2O and FIG. 2P illustrate various stages of a method for manufacturing a semiconductor device package accordance with some embodiments of the subject application.

FIG. 3A is a cross-sectional view of another semiconductor device in accordance with some embodiments of the present disclosure.

FIG. 3B is an enlarged view of the connection structure as shown in FIG. 3A.

FIG. 3C is an enlarged view of the connection structure as shown in FIG. 3A.

FIG. 3D illustrates lattice direction of the connection structure as shown in FIG. 3C.

FIG. 3E is a cross-sectional view of another semiconductor device package in accordance with some embodiments of the present disclosure.

FIG. 4A, FIG. 4B, FIG. 4C, FIG. 4D, FIG. 4E, FIG. 4F, FIG. 4G, FIG. 4H, FIG. 4I, FIG. 4J, FIG. 4K, FIG. 4L, FIG. 4M, FIG. 4N, FIG. 4O and FIG. 4P illustrate various stages of a method for manufacturing a semiconductor device package accordance with some embodiments of the subject application.

FIG. 5A is a cross-sectional view of another connection structure in accordance with some embodiments of the present disclosure.

FIG. 5B is a cross-sectional view of another connection structure in accordance with some embodiments of the present disclosure.

FIG. 5C is a cross-sectional view of another connection structure in accordance with some embodiments of the present disclosure.

Common reference numerals are used throughout the drawings and the detailed description to indicate the same or similar elements. The present disclosure will be more apparent from the following detailed description taken in conjunction with the accompanying drawings.

DETAILED DESCRIPTION

The following disclosure provides for many different embodiments, or examples, for implementing different features of the provided subject matter. Specific examples of components and arrangements are described below. These are, of course, merely examples and are not intended to be limiting. In the present disclosure, reference to the formation of a first feature over or on a second feature in the description that follows may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features may be formed between the first and second features, such that the first and second features may not be in direct contact. In addition, the present disclosure may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

Embodiments of the present disclosure are discussed in detail below. It should be appreciated, however, that the present disclosure provides many applicable concepts that can be embodied in a wide variety of specific contexts. The specific embodiments discussed are merely illustrative and do not limit the scope of the disclosure.

FIG. 1A is a cross-sectional view of a semiconductor device 1A in accordance with some embodiments of the present disclosure.

Referring to FIG. 1A, the semiconductor device 1A can include, for example but is not limited to, a microcontroller (MCU), a microprocessor (e.g., single or multi-core), a memory device, a memory controller, a chipset, a graphics device, a high bandwidth memory (HBM), or an application-specific integrated circuit (ASIC), etc.

The semiconductor device 1A can include a carrier 10 a, some connection structures 1 a, and a dielectric layer 12.

The carrier 10 a can include semiconductor material, glass or other suitable material(s).

The carrier 10 a can include a circuitry (not shown in FIG. 1A) electrically connected to the connection structures 1 a. The carrier 10 a can include a redistribution layer (RDL) structure (not shown in FIG. 1A) electrically connected to the connection structures 1 a. The semiconductor substrate 10 a can include conductive pad(s), trace(s) or via(s) (not shown in FIG. 1A) electrically connected to the connection structures 1 a.

The connection structures 1 a can include conductive material, for example but is not limited to, copper (Cu), gold (Au), aluminum (Al), or other suitable material.

The connection structure 1 a can be surrounded by the dielectric layer 12. The connection structure 1 a can be enclosed by the dielectric layer 12.

The connection structure 1 a can be covered by a dielectric layer 12. The connection structure 1 a can be partially covered by a dielectric layer 12.

The connection structure 1 a can be embedded within the dielectric layer 12. The connection structures 1 a can be separated or spaced apart from one another. A connection structure 1 a can be separated from another connection structure 1 a by a distance. The connection structures 1 a can be separated or spaced apart by the dielectric layer 12.

The connection structure 1 a can include two portions 14 a and 14 b. The portion 14 a may be formed or disposed on the carrier 10 a. The portion 14 b may be formed or disposed on the portion 14 a. The portions 14 a and 14 b can have different widths. The portion 14 a can have a width greater than the portion 14 b.

The portion 14 a can include an upper surface (not denoted in FIG. 1A), a lower surface (not denoted in FIG. 1A) and a lateral surface (not denoted in FIG. 1A) extended between the upper surface and the lower surface. The lower surface of the portion 14 a can be in direct contact with the carrier 10 a. The lateral surface of the portion 14 a can be in direct contact with the dielectric layer 12. The upper surface of the portion 14 a can be in direct contact with the portion 14 b. The upper surface of the portion 14 a can be exposed. The upper surface of the portion 14 a can be in direct contact with the dielectric layer 12.

The portion 14 b can include an upper surface (not denoted in FIG. 1A), a lower surface (not denoted in FIG. 1A) and a lateral surface (not denoted in FIG. 1A) extended between the upper surface and the lower surface. The lower surface of the portion 14 b can be in direct contact with the portion 14 a. The lateral surface of the portion 14 b can be separated or spaced apart from the dielectric layer 12 by a space 18. The lateral surface of the portion 14 b can be exposed. The lateral surface of the portion 14 b can be exposed to the space 18.

FIG. 1B is an enlarged view of the connection structure 1 a as shown in FIG. 1A.

Referring to FIG. 1B, the connection structure 1 a can include two portions 14 a and 14 b. The portion 14 a has a width W1, and the portion 14 b has a width W2. The width W1 can be larger than the width W2.

The portion 14 a can include some interconnection layers 14 a 1, 14 a 2 and 14 a 3.

The portion 14 b can include some interconnection layers 14 b 1, 14 b 2 and 14 b 3.

Each of the interconnection layers 14 a 1, 14 a 2, 14 a 3, 14 b 1, 14 b 2 and 14 b 3 may include, for example but is not limited to, aluminum (Al), copper (Cu), titanium (Ti), tungsten (W) or other suitable material(s) (e.g. metal, alloy or non-metal conductive material(s)).

Part of the portion 14 b can be embedded in the portion 14 a. For example, part of the interconnection layer 14 b 3 can be embedded in the portion 14 a.

The interconnection layer 14 a 1 can have a rectangle or a rectangle-like profile. The interconnection layer 14 a 1 can have a round or a round-like profile.

The interconnection layer 14 a 1 can surround the interconnection layer 14 b 3. The interconnection layer 14 a 1 can enclose the interconnection layer 14 b 3.

The interconnection layer 14 a 1 can be exposed to the space 18. The interconnection layer 14 a 1 can be exposed to the air in the space 18. The interconnection layer 14 a 1 can be covered by the dielectric layer 12. The interconnection layer 14 a 1 can be in direct contact with the dielectric layer 12.

The interconnection layer 14 a 2 can have a U shape or a U shape-like structure. The interconnection layer 14 a 2 can include a cup or cup-like structure. The interconnection layer 14 a 2 can surround the interconnection layer 14 a 1. The interconnection layer 14 a 2 can enclose the interconnection layer 14 a 1. The interconnection layer 14 a 2 can be in direct contact with the interconnection layer 14 a 1. The interconnection layer 14 a 2 can be in direct contact with the dielectric layer 12. The interconnection layer 14 a 2 can be covered by the dielectric layer 12. The interconnection layer 14 a 2 can be disposed between the interconnection layer 14 a 1 and the interconnection layer 14 a 3.

The interconnection layer 14 a 3 can have a U shape or a U shape-like structure. The interconnection layer 14 a 3 can include a cup or cup-like structure. The interconnection layer 14 a 3 can surround the interconnection layer 14 a 1. The interconnection layer 14 a 3 can surround the interconnection layer 14 a 2. The interconnection layer 14 a 3 can enclose the interconnection layer 14 a 1. The interconnection layer 14 a 3 can enclose the interconnection layer 14 a 2. The interconnection layer 14 a 3 can be in direct contact with the interconnection layer 14 a 2. The interconnection layer 14 a 3 can be in direct contact with the dielectric layer 12. The interconnection layer 14 a 3 can be in direct contact with the carrier 10 a. The interconnection layer 14 a 3 can be covered by the dielectric layer 12. The interconnection layer 14 a 3 can be disposed between the interconnection layer 14 a 2 and the dielectric layer 12.

The interconnection layer 14 b 2 can be formed or disposed on the interconnection layer 14 b 3. The interconnection layer 14 b 1 can be formed or disposed on the interconnection layer 14 b 2. The interconnection layer 14 b 1 can have a width substantially the same to the interconnection layer 14 b 2. The interconnection layer 14 b 1 can have a width substantially the same to the interconnection layer 14 b 3.

A portion S11 of the upper surface S1 of the interconnection layer 14 a 1 can be exposed by the dielectric layer 12. The portion S11 of the upper surface S1 of the interconnection layer 14 a 1 can be exposed to the space 18. A portion S12 of the upper surface S1 of the interconnection layer 14 a 1 can be covered by the dielectric layer 12. The portion S12 of the upper surface S1 of the interconnection layer 14 a 1 can be in direct contact with the dielectric layer 12.

A lateral surface of the interconnection layer 14 b 2 can be exposed to the space 18. The lateral surface of the interconnection layer 14 b 2 can be in direct contact with the air in space 18. A lateral surface of the interconnection layer 14 b 1 can be exposed to the space 18. The lateral surface of the interconnection layer 14 b 1 can be in direct contact with the air in space 18.

The space 18 can be vacuum. There can be air in the space 18. The space 18 can be defined or surrounded by the portion S11 of the upper surface S1 of the interconnection layer 14 a 1, the lateral surface of the interconnection layer 14 b 1, the lateral surface of the interconnection layer 14 b 2, and the lateral surface of the dielectric layer 12. A boundary of the space 18 can be formed or defined by the portion S11 of the upper surface S1 of the interconnection layer 14 a 1, the lateral surface of the interconnection layer 14 b 1, the lateral surface of the interconnection layer 14 b 2, and the lateral surface of the dielectric layer 12.

FIG. 1C is an enlarged view of the connection structure 1 a as shown in FIG. 1A.

Referring to FIG. 1C, the connection structure 1 a is similar to the connection structure 1 a as illustrated and described with reference to FIG. 1B, except that the interconnection layer 14 b 3 can be surrounded by the interconnection layer 14 a 1. The entire interconnection layer 14 b 3 can be surrounded by the interconnection layer 14 a 1. The interconnection layer 14 b 3 can be enclosed by the interconnection layer 14 a 1. The entire interconnection layer 14 b 3 can be enclosed by the interconnection layer 14 a 1. The interconnection layer 14 b 3 can be embedded within the interconnection layer 14 a 1. The entire interconnection layer 14 b 3 can be embedded within the interconnection layer 14 a 1. An upper surface of the interconnection layer 14 a 1 can be substantially coplanar with an upper surface of the interconnection layer 14 b 3.

FIG. 1D illustrates lattice direction of the connection structure as shown in FIG. 1C.

Referring to FIG. 1D, the interconnection layer 14 b 1 can have a crystal structure. The interconnection layer 14 b 1 can have a crystallographic direction or lattice direction as denoted by an arrow D1. The crystallographic direction or lattice direction D1 can include a direction of (111) (Miller indices).

FIG. 1E is a cross-sectional view of a semiconductor device package 1 in accordance with some embodiments of the present disclosure.

Referring to FIG. 1E, the semiconductor device package 1 can include two semiconductor devices 1A and 1B. The semiconductor device 1A can include a plurality of connection structures 1 a on the carrier 10 a. The semiconductor device 1B can include a plurality of connection structures 1 b on the carrier 10 b.

The semiconductor device 1B can be same or similar to the semiconductor device 1A. The semiconductor device 1B can be different from the semiconductor device 1A.

The connection structure 1 b can be same or similar to the connection structures 1 a. The connection structure 1 b can be different from the connection structures 1 a.

Hybrid bonding technique can be used to form a semiconductor device package 1. The semiconductor device package 1 can be formed by heat and compression operation. Hybrid bonding can refer to bonding that involves two or more materials (e.g. metal-to-metal bonding and dielectric-to-dielectric bonding). The interconnection layer of the connection structure 1 a (e.g. the interconnection layer 14 b 1) can be bonded to the interconnection layer of the connection structure 1 b (e.g. the interconnection layer 14 b 1). The dielectric layer 12 of the connection structure 1 a can be bonded to the dielectric layer 12 of the connection structure 1 b.

The semiconductor device 1A can include the interconnection structure 1 a having the lattice direction as shown in FIG. 1D. The semiconductor device 1B can include the interconnection structure 1 b having the lattice direction as shown in FIG. 1D. Bonding between the interconnection layer 14 b 1 of the semiconductor device 1A and the interconnection layer 14 b 1 of the semiconductor device 1B can be performed or achieved at a relatively low temperature due to the lattice direction thereof (e.g. the (111) direction). In other words, relatively less heat is applied to bond the interconnection layer 14 b 1 of the semiconductor device 1A to the interconnection layer 14 b 1 of the semiconductor device 1B.

The interconnection layer 14 b, which has relatively great coefficient of thermal expansion (CTE) than the dielectric layer 12, can be disposed apart from the dielectric layer 12 by the space 18. The space 18 may function as a buffer such that reliability issues (e.g. delamination issue) resulted from CTE mismatch during or subsequent to thermal cycle(s) can be mitigated or alleviated.

For example, tensile stress TS, which can be resulted from heat and compression operation, may remain in the dielectric layer 12 subsequent to the heat and compression operation. The residual tensile stress TS can delaminate the upper dielectric layer 12 from the lower dielectric layer 12. However, the interconnection layer 14 a, which has relatively great width than the interconnection layer 14 b, can function as a support structure which can resist the tensile stress TS. In other words, delamination that may happen or occur at the interface (or boundary) between the upper dielectric layer 12 and the lower dielectric layer 12 can be avoid.

FIG. 2A, FIG. 2B, FIG. 2C, FIG. 2D, FIG. 2E, FIG. 2F, FIG. 2G, FIG. 2H, FIG. 2I, FIG. 2J, FIG. 2K, FIG. 2L, FIG. 2M, FIG. 2N, FIG. 2O and FIG. 2P illustrate various stages of a method for manufacturing a semiconductor device package 1 accordance with some embodiments of the subject application.

Referring to FIG. 2A, the dielectric layer 12 a can be formed or deposited the carrier 10 a. The dielectric layer 12 a can be formed by, for example but is not limited to, sputtering, deposition (e.g. chemical vapor deposition (CVD)) technique or other suitable technique(s). The dielectric layer 12 a can include, for example but is not limited to, silicon oxide or other suitable material(s).

Referring to FIG. 2B, a patterned mask 13 a can be formed on the dielectric layer 12 a to expose the dielectric layer 12 a. The patterned mask (or photomask) 13 a can include, for example but is not limited to, photoresist (PR) material or other suitable material(s). The patterned mask 12 a can be formed by, for example but is not limited to, photolithography technique (which may involve coating, exposure, developing) or other suitable technique(s).

Referring to FIG. 2C, the portions of the dielectric layer 12 a which are not covered by the patterned mask 13 a can be removed. The removing operation can be performed by, for example but is not limited to, etching (e.g. dry etching) technique or other suitable technique(s).

Referring to FIG. 2D, the patterned mask 13 a can be removed. The patterned mask 13 a can be removed by, for example but is not limited to, striping, etching or other suitable technique(s).

Referring to FIG. 2E, the interconnection layer 14 a 2 can be formed on the dielectric layer 12 a and the disposed portions of the carrier 10 a. The interconnection layer 14 a 1 can be formed on the interconnection layer 14 a 2. An interconnection layer 14 a 3 (not denoted in FIG. 2E) can be further included to surround the interconnection layer 14 a 3.

The interconnection layers 14 a 1 and 14 a 2 can be formed by, for example but is not limited to, sputtering, deposition (e.g. physical vapor deposition (PVD)) or other suitable technique(s). The interconnection layers 14 a 1 and 14 a 2 can be formed by, for example but is not limited to, etching or other suitable technique(s).

Referring to FIG. 2F, the planarization operation can be performed to expose the interconnection layer 14 a 2. The planarization operation can be formed by, for example but is not limited to, chemical mechanical polishing (CMP), grinding, dry polishing, etching or other suitable technique(s).

Referring to FIG. 2G, the dielectric layer 12 b can be formed or deposited accordingly. The dielectric layer 12 b can be formed by, for example but is not limited to, sputtering, deposition (e.g. chemical vapor deposition (CVD)) technique or other suitable technique(s). The dielectric layer 12 b can include, for example but is not limited to, silicon oxide or other suitable material(s).

Referring to FIG. 2H, a patterned mask 13 b can be formed on the dielectric layer 12 to expose the dielectric layer 12. The patterned mask (or photomask) 13 b can include, for example but is not limited to, photoresist (PR) material or other suitable material(s). The patterned mask 13 b can be formed by, for example but is not limited to, photolithography technique (which may involve coating, exposure, developing) or other suitable technique(s).

Referring to FIG. 2I, the portions of the dielectric layer 12 which are not covered by the patterned mask 13 b can be removed. The removing operation can be performed by, for example but is not limited to, etching (e.g. dry etching) technique or other suitable technique(s).

Referring to FIG. 2J, the patterned mask 13 b can be removed. The patterned mask 13 b can be removed by, for example but is not limited to, striping, etching or other suitable technique(s).

Referring to FIG. 2K, the interconnection layer 14 b 2 can be formed on the dielectric layer 12 and the disposed portions of the interconnection layer 41 a 1. The interconnection layers 14 b 2 can be formed by, for example but is not limited to, sputtering, deposition (e.g. physical vapor deposition (PVD)) or other suitable technique(s).

Referring to FIG. 2L, a patterned mask 13 c can be formed on the interconnection layer 14 b 2 to expose the interconnection layer 14 b 2. The patterned mask (or photomask) 13 b can include, for example but is not limited to, photoresist (PR) material or other suitable material(s). The patterned mask 13 c can be formed by, for example but is not limited to, photolithography technique (which may involve coating, exposure, developing) or other suitable technique(s).

Referring to FIG. 2M, the interconnection layer 14 b 1 can be formed on the dielectric layer 12 and surrounded by the patterned mask 13 c. The interconnection layer 14 b 1 can be formed by, for example but is not limited to, sputtering, deposition (e.g. physical vapor deposition (PVD)) or other suitable technique(s).

Referring to FIG. 2N, the patterned mask 13 c can be removed. The patterned mask 13 c can be removed by, for example but is not limited to, striping, etching or other suitable technique(s).

Referring to FIG. 2O, the portions of the interconnection layer 14 b 2 which are not covered by the interconnection layer 14 b 1 can be removed. The removing operation can be performed by, for example but is not limited to, etching (e.g. dry etching) technique or other suitable technique(s).

Referring to FIG. 2P, the planarization operation can be performed so that the interconnection layer 14 b 1 can be substantially coplanar with the dielectric layer 12. The planarization operation can be formed by, for example but is not limited to, chemical mechanical polishing (CMP), grinding, dry polishing, etching or other suitable technique(s).

FIG. 3A is a cross-sectional view of another semiconductor package 1A in accordance with some embodiments of the present disclosure.

Referring to FIG. 3A, the semiconductor device 1A can include, for example but is not limited to, a microcontroller (MCU), a microprocessor (e.g., single or multi-core), a memory device, a memory controller, a chipset, a graphics device, a high bandwidth memory (HBM), or an application-specific integrated circuit (ASIC) according to several different embodiments.

The semiconductor device 1A can include a carrier 10 a, some connection structures 1 a, and a dielectric layer 12.

The carrier 10 a can include semiconductor material, glass or other suitable material(s).

The carrier 10 a can include a circuitry (not shown in FIG. 3A) electrically connected to the connection structures 1 a. The carrier 10 a can include a redistribution layer (RDL) structure (not shown in FIG. 3A) electrically connected to the connection structures 1 a. The semiconductor substrate 10 a can include conductive pad(s), trace(s) or via(s) (not shown in FIG. 3A) electrically connected to the connection structures 1 a.

The connection structures 1 a can include conductive material, for example but is not limited to, copper (Cu), gold (Au), aluminum (Al), or other suitable material.

The connection structure 1 a can be surrounded by the dielectric layer 12. The connection structure 1 a can be enclosed by the dielectric layer 12.

The connection structure 1 a can be covered by a dielectric layer 12. The connection structure 1 a can be partially covered by a dielectric layer 12.

The connection structure 1 a can be embedded within the dielectric layer 12. The connection structures 1 a can be separated or spaced apart from one another. A connection structure 1 a can be separated from another connection structure 1 a by a distance. The connection structures 1 a can be separated or spaced apart by the dielectric layer 12.

The connection structure 1 a can include two portions 14 a and 14 b. The portion 14 a may be formed or disposed on the carrier 10 a. The portion 14 b may be formed or disposed on the portion 14 a. The portions 14 a and 14 b can have different widths. The portion 14 a can have a width greater than the portion 14 b.

The portion 14 a can include an upper surface (not denoted in FIG. 3A), a lower surface (not denoted in FIG. 3A) and a lateral surface (not denoted in FIG. 3A) extended between the upper surface and the lower surface. The lower surface of the portion 14 a can be in direct contact with the carrier 10 a. The lateral surface of the portion 14 a can be in direct contact with the dielectric layer 12. The upper surface of the portion 14 a can be in direct contact with the portion 14 b. The upper surface of the portion 14 a can be exposed. The upper surface of the portion 14 a can be in direct contact with the dielectric layer 12.

The portion 14 b can include an upper surface (not denoted in FIG. 3A), a lower surface (not denoted in FIG. 3A) and a lateral surface (not denoted in FIG. 3A) extended between the upper surface and the lower surface. The lower surface of the portion 14 b can be in direct contact with the portion 14 a. The lateral surface of the portion 14 b can be separated or spaced apart from the dielectric layer 12 by a space 18. The lateral surface of the portion 14 b can be exposed. The lateral surface of the portion 14 b can be exposed to the space 18.

FIG. 3B is an enlarged view of the connection structure 1 a as shown in FIG. 3A.

Referring to FIG. 3B, the connection structure 1 a can include two portions 14 a and 14 b. The portion 14 a has a width W1, and the portion 14 b has a width W2. The width W1 can be larger than the width W2.

The portion 14 a can include some interconnection layers 14 a 1, 14 a 2 and 14 a 3.

The portion 14 b can include some interconnection layers 14 b 1, 14 b 2 and 14 b 3.

Each of the interconnection layers 14 a 1, 14 a 2, 14 a 3, 14 b 1, 14 b 2 and 14 b 3 may include, for example but is not limited to, aluminum (Al), copper (Cu), titanium (Ti), tungsten (W) or other suitable material(s) (e.g. metal, alloy or non-metal conductive material(s)).

The interconnection layer 14 a 1 can have a rectangle or a rectangle-like profile. The interconnection layer 14 a 1 can have a round or a round-like profile.

The interconnection layer 14 a 1 can be exposed to the space 18. The interconnection layer 14 a 1 can be exposed to the air in the space 18. The interconnection layer 14 a 1 can be covered by the dielectric layer 12. The interconnection layer 14 a 1 can be in direct contact with the dielectric layer 12.

The interconnection layer 14 a 2 can have a U shape or a U shape-like structure. The interconnection layer 14 a 2 can include a cup or cup-like structure. The interconnection layer 14 a 2 can surround the interconnection layer 14 a 1. The interconnection layer 14 a 2 can enclose the interconnection layer 14 a 1. The interconnection layer 14 a 2 can be in direct contact with the interconnection layer 14 a 1. The interconnection layer 14 a 2 can be in direct contact with the dielectric layer 12. The interconnection layer 14 a 2 can be covered by the dielectric layer 12. The interconnection layer 14 a 2 can be disposed between the interconnection layer 14 a 1 and the interconnection layer 14 a 3.

The interconnection layer 14 a 3 can have a U shape or a U shape-like structure. The interconnection layer 14 a 3 can include a cup or cup-like structure. The interconnection layer 14 a 3 can surround the interconnection layer 14 a 1. The interconnection layer 14 a 3 can surround the interconnection layer 14 a 2. The interconnection layer 14 a 3 can enclose the interconnection layer 14 a 1. The interconnection layer 14 a 3 can enclose the interconnection layer 14 a 2. The interconnection layer 14 a 3 can be in direct contact with the interconnection layer 14 a 2. The interconnection layer 14 a 3 can be in direct contact with the dielectric layer 12. The interconnection layer 14 a 3 can be in direct contact with the carrier 10 a. The interconnection layer 14 a 3 can be covered by the dielectric layer 12. The interconnection layer 14 a 3 can be disposed between the interconnection layer 14 a 2 and the dielectric layer 12.

A portion S11 of the upper surface S1 of the interconnection layer 14 a 1 can be exposed by the dielectric layer 12. The portion S11 of the upper surface S1 of the interconnection layer 14 a 1 can be exposed to the space 18. A portion S12 of the upper surface S1 of the interconnection layer 14 a 1 can be covered by the dielectric layer 12. The portion S12 of the upper surface S1 of the interconnection layer 14 a 1 can be in direct contact with the dielectric layer 12.

The interconnection layer 14 b 1 can have a rectangle or a rectangle-like profile. The interconnection layer 14 b 1 can have a round or a round-like profile.

The interconnection layer 14 b 2 can have a U shape or a U shape-like structure. The interconnection layer 14 b 2 can include a cup or cup-like structure. The interconnection layer 14 b 2 can surround the interconnection layer 14 b 1. The interconnection layer 14 b 2 can enclose the interconnection layer 14 b 1. The interconnection layer 14 b 2 can be in direct contact with the interconnection layer 14 b 1. The interconnection layer 14 b 2 can be in direct contact with the interconnection layer 14 b 1. The interconnection layer 14 b 2 can be disposed between the interconnection layer 14 b 1 and the interconnection layer 14 b 3.

The interconnection layer 14 b 3 can have a U shape or a U shape-like structure. The interconnection layer 14 b 3 can include a cup or cup-like structure. The interconnection layer 14 b 3 can surround the interconnection layer 14 b 1. The interconnection layer 14 b 3 can surround the interconnection layer 14 b 2. The interconnection layer 14 b 3 can enclose the interconnection layer 14 b 1. The interconnection layer 14 b 3 can enclose the interconnection layer 14 b 2. The interconnection layer 14 b 3 can be in direct contact with the interconnection layer 14 b 2. The interconnection layer 14 b 3 can be disposed between the interconnection layer 14 b 2 and the space 18.

A lateral surface of the interconnection layer 14 b 3 can be exposed to the space 18. The space 18 can be vacuum. There can be air in the space 18. The lateral surface of the interconnection layer 14 b 3 can be in direct contact with the air in space 18. The space 18 can be defined or surrounded by the portion S11 of the upper surface S1 of the interconnection layer 14 a 1, the lateral surface of the interconnection layer 14 b 3, and the lateral surface of the dielectric layer 12. A boundary of the space 18 can be formed or defined by the portion S11 of the upper surface S1 of the interconnection layer 14 a 1, the lateral surface of the interconnection layer 14 b 3, and the lateral surface of the dielectric layer 12.

FIG. 3C is an enlarged view of the connection structure 1 a as shown in FIG. 3A. Referring to FIG. 3C, the connection structure 1 a is similar to the connection structure 1 a as illustrated and described with reference to FIG. 3B, except that the portion S11 of the upper surface S1 of the interconnection layer 14 a 1 is uneven or rugged due to over-etching by an etching (e.g. dry etching) technique or other suitable technique(s).

Referring to FIG. 3D, the connection structure 1 a is similar to the connection structure 1 a as illustrated and described with reference to FIG. 3C, except that a lattice of the interconnection layer 14 b 1 can be further illustrated. Referring to FIG. 3D, the interconnection layer 14 b 1 can have a crystal structure. The interconnection layer 14 b 1 can have a crystallographic direction or lattice direction as denoted by an arrow D1. The crystallographic direction or lattice direction D1 can include a direction of (111) (Miller indices). The lattice of the interconnection layer 14 b 1 can extend toward at least two different directions from the interconnection layer 14 b 2. The lattice of the interconnection layer 14 b 1 can extend along several directions D1, D2 and D3.

FIG. 3E is a cross-sectional view of a semiconductor device package 1 in accordance with some embodiments of the present disclosure. The semiconductor device package 1 can include two semiconductor devices 1A and 1B. The banding pair 1A can include a plurality of connection structures 1 a on the carrier 10 a. The banding pair 1B can include a plurality of connection structures 1 b on the carrier 10 b.

Hybrid bonding technique can be used to form a semiconductor device package 1. Hybrid bonding can refer to bonding that involves two or more materials (e.g. metal-to-metal bonding and dielectric-to-dielectric bonding). The interconnection layer of the portion 1 a can be bonded to the interconnection layer of the portion 1 b. The dielectric layer of the portion 1 a can be bonded to the dielectric layer of the portion 1 b.

However, coefficient of thermal expansion (CTE) mismatch of two or more materials during or subsequent to thermal cycle(s) may result in delamination issue (e.g. delamination occurs on the interface of two dielectric layers), which adversely affect reliability or performance of the semiconductor device package 1.

When CTE mismatch occurs, the space 18 can be used as a trench or buffer. The contact surface of the materials will not be damaged or degraded due to the CTE mismatch. Therefore, during the thermal cycle(s), the semiconductor device package 1 can be prevented from delamination by arranging the space 18 between the interconnection layer and the dielectric layer.

During the thermal cycle(s), compression stress CS can be generated from the portions 14 a and 14 b respectively due to the thermal expansion. Another tensile stress TS can be generated from the dielectric layer corresponding to the above compression stress CS. The portion 14 a can have a width greater than the portion 14 b. The upper surface and the lateral surface of the portion 14 a directly contacts the dielectric layer 12. Therefore, a portion of the tensile stress TS can be countervailed or compensated by the compression stress CS of the portion 14 a. Therefore, the delamination or degradation can be further reduced.

FIG. 4A, FIG. 4B, FIG. 4C, FIG. 4D, FIG. 4E, FIG. 4F, FIG. 4G, FIG. 4H, FIG. 4I, FIG. 4J, FIG. 4K, FIG. 4L, FIG. 4M, FIG. 4N, FIG. 4O and FIG. 4P illustrate various stages of a method for manufacturing a semiconductor device package 1 accordance with some embodiments of the subject application. FIG. 4A to FIG. 4K are similar to those as illustrated and described with reference to FIG. 2A to FIG. 2K, and will not be further illustrated again.

Referring to FIG. 4K, the interconnection layer 14 b 2 can be formed or deposited accordingly. The interconnection layer 14 b 2 can be formed by, for example but is not limited to, sputtering, deposition (e.g. physical vapor deposition (PVD)) or other suitable technique(s).

Referring to FIG. 4L, the interconnection layer 14 b 1 can be formed on the interconnection layer 14 b 2. The interconnection layers 14 b 1 can be formed by, for example but is not limited to, sputtering, deposition (e.g. physical vapor deposition (PVD)) or other suitable technique(s).

Referring to FIG. 4M, the planarization operation can be performed to expose the interconnection layer 14 b 2 and the dielectric layer 12. The planarization operation can be formed by, for example but is not limited to, chemical mechanical polishing (CMP), grinding, dry polishing, etching or other suitable technique(s).

Referring to FIG. 4N, a patterned mask 13 c can be formed on the dielectric layer 12 to expose the interconnection layers 14 b 1 and 14 b 2. The patterned mask (or photomask) 13 c can include, for example but is not limited to, photoresist (PR) material or other suitable material(s). The patterned mask 12 c can be formed by, for example but is not limited to, photolithography technique (which may involve coating, exposure, developing) or other suitable technique(s).

Referring to FIG. 4O, the portions of the dielectric layer 12 which are not covered by the patterned mask 13 c can be removed. The removing operation can be performed by, for example but is not limited to, etching (e.g. dry etching) technique or other suitable technique(s).

Referring to FIG. 4P, the planarization operation can be performed so that the interconnection layers 14 b 1 and 14 b 2 can be substantially coplanar with the dielectric layer 12. The planarization operation can be formed by, for example but is not limited to, chemical mechanical polishing (CMP), grinding, dry polishing, etching or other suitable technique(s).

FIG. 5A is a cross-sectional view of another connection structure in accordance with some embodiments of the present disclosure.

Referring to FIG. 5A, the connection structure 2 a has an interconnection structure 24 a and an interconnection structure 24 b. The interconnection structure 24 a has interconnection layers 24 a 1, 24 a 2 and 24 a 3. The interconnection structure 24 b has interconnection layers 24 b 1, 24 b 2 and 24 b 3. The interconnection structure 24 a has a relatively less width than the interconnection structure 24 b.

The connection structure 2 a can be formed by removing the dielectric layer 22 around or adjacent to the interconnection structure 24 b. However, a relatively uneven bottom surface (e.g. the bottom surface which defines the space 18 a can be higher than the bottom surface which defines the space 18 b) may be formed subsequent to the removal of the dielectric layer 22.

Moreover, a relatively rough surface 22 s can be formed subsequent to the removal of the dielectric layer 22. Delamination can occur at interface between the dielectric layer 22 and the interconnection structure 24 b (e.g. interconnection structure 24 b 3).

FIG. 5B is a cross-sectional view of another connection structure in accordance with some embodiments of the present disclosure.

Referring to FIG. 5B, the connection structure 2 a′ can be formed by similar process to manufacture the connection structure 2 a as shown in FIG. 5A, except that the conductive material is selectively removed but the dielectric layer 22 which is in direct contact with the interconnection layer 24 b 3 remains. For example, part of the interconnection structure 24 b 1 and the interconnection layer 24 b 2 as shown in FIG. 5A can be removed to form the interconnection structure 24 b 1′ and the interconnection structure 24 b 2′, while the interconnection layer 24 b 3 can remain. The interconnection structure 24 a has a relatively less width than the interconnection structure 24 b′.

The interconnection layer 24 b 3 has a relatively great CTE than the dielectric layer 22. Delamination can occur at interface between the dielectric layer 22 and the interconnection structure 24 b (e.g. interconnection structure 24 b 3) during or subsequent to the thermal cycle(s) due to CTE mismatch.

FIG. 5C is a cross-sectional view of another connection structure in accordance with some embodiments of the present disclosure.

Referring to FIG. 5C, the connection structure 2 a″ is similar to the connection structure 2 a′ as described and illustrated with reference to FIG. 5B, except that the interconnection layer 24 b 1′ is replaced by the interconnection layer 24 b 1″.

As used herein, spatially relative terms, such as “beneath,” “below,” “lower,” “above,” “upper,” “lower,” “left,” “right” and the like, may be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The apparatus may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein may likewise be interpreted accordingly. It should be understood that when an element is referred to as being “connected to” or “coupled to” another element, it may be directly connected to or coupled to the other element, or intervening elements may be present.

As used herein, the terms “approximately”, “substantially”, “substantial” and “about” are used to describe and account for small variations. When used in conduction with an event or circumstance, the terms can refer to instances in which the event of circumstance occurs precisely as well as instances in which the event or circumstance occurs to a close approximation. As used herein with respect to to given value or range, the term “about” generally means within ±10%, ±5%, ±1%, or ±0.5% of the given value or range. Ranges can be expressed herein as from one endpoint to another endpoint or between two endpoints. All ranges disclosed herein are inclusive of the endpoints, unless specified otherwise. The term “substantially coplanar” can refer to two surfaces within micrometers (μm) of lying along a same plane, such as within 10 within 5 within 1 or within 0.5 μm of lying along the same plane. When referring to numerical values or characteristics as “substantially” the same, the term can refer to the values lying within ±10%, ±5%, ±1%, or ±0.5% of an average of the values.

The foregoing outlines features of several embodiments and detailed aspects of the present disclosure. The embodiments described in the present disclosure may be readily used as a basis for designing or modifying other processes and structures for carrying out the same or similar purposes and/or achieving the same or similar advantages of the embodiments introduced herein. Such equivalent constructions do not depart from the spirit and scope of the present disclosure, and various changes, substitutions, and alterations may be made without departing from the spirit and scope of the present disclosure. 

The invention claimed is:
 1. A semiconductor device package, comprising: a connection structure having a first portion and a second portion extending from the first portion, the second portion having a width less than the first portion; and a dielectric layer surrounding the connection structure, wherein the dielectric layer and the second portion of the connection structure defines a space, the second portion comprises a third interconnection layer and a fourth interconnection layer, the third interconnection layer is formed on the fourth interconnection layer, and at least one portion of a lateral surface of the third interconnection layer is exposed to the space.
 2. The semiconductor device package of claim 1, wherein the first portion of the connection structure comprises a first interconnection layer, and wherein the first interconnection layer has a cup structure.
 3. The semiconductor device package of claim 2, wherein a portion of the fourth interconnection layer is surrounded by the first interconnection layer.
 4. The semiconductor device package of claim 2, wherein the second portion further comprises a fifth interconnection layer on the third interconnection layer, and a lattice of the fifth interconnection layer extends toward at least two different directions from the third interconnection layer.
 5. The semiconductor device package of claim 1, wherein the first portion of the connection structure comprises a first interconnection layer, and wherein the first interconnection layer has a U shape or a U shape-like structure.
 6. The semiconductor device package of claim 5, wherein the first portion of the connection structure comprises a second interconnection layer surrounding the first interconnection layer.
 7. The semiconductor device package of claim 5, wherein a first part of the first portion of the connection structure is covered by the dielectric layer and a second part of the first portion of the connection structure is exposed by the dielectric layer.
 8. The semiconductor device package of claim 7, wherein the second part of the first portion of the connection structure, the dielectric layer and the second portion of the connection structure defines the space.
 9. The semiconductor device package of claim 1, wherein the second portion further comprises a fifth interconnection layer on the third interconnection layer, and a lattice of the fifth interconnection layer extends toward a direction from the third interconnection layer.
 10. The semiconductor device package of claim 9, wherein the direction is (111) direction.
 11. The semiconductor device package of claim 1, wherein the third interconnection layer has a U shape or a U shape-like structure.
 12. A semiconductor device package, comprising: a connection structure having a first portion and a second portion disposed on the first portion; and a dielectric layer exposing part of an upper surface of the first portion of connection structure, wherein the dielectric layer and the exposed part of the upper surface of the first portion of connection structure defines a space, and the second portion comprises a third interconnection layer and a fourth interconnection layer having widths substantially equal to the third interconnection layer.
 13. The semiconductor device package of claim 12, wherein the first portion of the connection structure comprises a first interconnection layer, and wherein the first interconnection layer has a cup structure.
 14. The semiconductor device package of claim 12, wherein the first portion of the connection structure comprises a first interconnection layer, and wherein the first interconnection layer has a U shape or a U shape-like structure.
 15. The semiconductor device package of claim 14, wherein the first portion of the connection structure comprises a second interconnection layer surrounding the first interconnection layer.
 16. The semiconductor device package of claim 14, wherein a first part of the first portion of the connection structure is covered by the dielectric layer and a second part of the first portion of the connection structure is exposed by the dielectric layer.
 17. The semiconductor device package of claim 14, wherein parts of the first interconnection layer and the second interconnection layer are covered by the dielectric layer.
 18. The semiconductor device package of claim 17, wherein a portion of an upper surface of the first portion is exposed to the space.
 19. The semiconductor device package of claim 17, wherein the fourth interconnection layer surrounds the third interconnection layer as a U shape or a U-shape like structure.
 20. The semiconductor device package of claim 19, wherein a lateral surface of the fourth interconnection layer is exposed to the space.
 21. The semiconductor device package of claim 19, wherein a lattice of the third interconnection layer extends toward at least two different directions from the fourth interconnection layer.
 22. The semiconductor device package of claim 12, wherein at least a portion of a lateral surface of the third interconnection layer is exposed to the space.
 23. The semiconductor device package of claim 12, wherein a lattice of the third interconnection layer extends toward a direction from the fourth interconnection layer.
 24. A method of manufacturing a semiconductor device package, comprising: forming a first portion of a connection structure on a substrate; forming a second portion of a connection structure on the first portion, wherein the second portion comprises a third interconnection layer and a fourth interconnection layer having widths substantially equal to the third interconnection layer; and forming a dielectric layer to surround the connection structure and to define a space with the connection structure.
 25. The method of claim 24, further comprising: forming a first interconnection layer of the first portion; and forming a fifth interconnection layer of the second portion having a width less than the first interconnection layer.
 26. The method of claim 25, wherein a lateral surface of the fifth interconnection layer is exposed to the space.
 27. The method of claim 26, further comprising forming the third interconnection layer of the second portion to surround the fifth interconnection layer as a U shape or a U-like shape. 